A continuation of the pitfalls of ether anaesthesia. Intertitle; 3. Lack of premedication. The anaesthetist becomes aware that his patient's breathing is troubled and, upon investigation, finds that he is over salivating; the premedication was given only 5 minutes prior to anaesthesia, the patient also has false teeth, which are removed. The patient vomits. The male patient is tended to. A nasal airway is inserted and induction continues. Intertitle: 4. Laryngeal spasm in the second stage. If the mask becomes soaked with ether, then the patient may suffer from stridor; their breath becomes laboured and may stop. The mask is removed until the spasm has passed. A further complication is cyanosis, this may result in his heart stopping, the pulse is checked. Anaesthesia continues. Intertitle; 5. Respiratory arrest due to overdose. The next patient is deeply anaesthetised; the eyes are shown. This is the fourth stage. The patient's pulse is checked; it is steady. Artificial respiration is demonstrated by her chest being massaged and then oxygen with carbon dioxide is introduced. The masks are replaced.